Electric signal.



No. 856,071. EATENTED JUNE 4, 1907. E. LANGEUM;

ELECTRIC SIGNAL.

APPLICATION FILED OCT. 6. 1906.

3 vw@ nto@ Witnesses W @5% M i Gmane? GEORGE LANGLUME, OF NEW ORLEANS, LOUISIANA, ASSIGNOR OF ONE- IfIALF TOl HYMAN HIRSCH, OF NEW ORLEANS, LOUISIANA.

ELECTRIC SIGNAL.

Specification of Letters Patent.

Patented. June 4:, 1907.

Application iled October 6, 1906. Serial No. 337,783.

To @ZZ whom, it ina/y concern.-

Be it known that I, GEORGE LANGLUM, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented new and useful Improvements in Electric Signals, of which the following is a specification.

My invention pertains to electric signals; and it contemplates the provision of a compact, durable and inexpensive electric signal, designed to give an alarm in the event of a vacuum pump or condenser ceasing to work, this with aview of rendering it unnecessary for an engineer to watch the gage, and of avoiding the necessity of the engineer at frequent intervals visiting tlie condenser which in most plants is not on the same floor with the engine and pump.

The invention will be fully understood from the following description and claims when the same are read in connection with the accompanying drawing, forming part of this specific ation, in which the ligure is a view illustrating the circuit closer of the signal, partly in elevation and partly in section, as electrically connected with a source of electric energy and an electric bell.

Referring by letter to said drawing: A is a source of electric energy, and B is an electric bell, both of which are preferably of the conventional construction.

C isthe circuit closer which is arranged in a normally open circuit with the source of electric energy and the bell as will be hereinafter described in detail. The said circuit closer comprises a bracket ay adapted to be attached to a support (not shown) and having upper and lower apertured arms b and c, a binding post d carried by the bracket and connected to one wire c of the electric circuit, a cup I) for holding mercury E, secured in the lower apertured arm c or' bracket O and having an 4l an integral,

tured head 7c, a plunger II movable in the cylinder, between the abutment 7L and the head c, and a stem ger and movable through the apertured head 7c and into the mercury E in cup D. The said stem Z is preferably threaded as shown and provided with a iinger piece m, of nonconducting material, to permit of the stein and plunger being readily raised by the en gi neer when necessary.

In the practical use of my novel signal, the pipe F is connected with the vacuum pump or condenser (not shown) and the plunger II is raised and held in position by vacuum from pipe F when the plunger will be retained in such position so long as the vacuum is maintained. In the event, however, of the pumps stopping or the vacuum being destroyed in any other manner, the plunger II will drop and the plunger stem Z entering the mercury E in cup D, which is insulated from bracket a, will complete the electric circuit with the result that the electric bell B will be sounded and the engineer apprised of the 'fact that the vacuum is lacking.

The construction herein shown and described constitutes the preferred embodiment of my invention, but I desire it understood that in practice such changes in the form, construction, and relative arrangement of parts may be made as fairly fall within the scope of my invention as claimed.

I'Iaving described my invention, what I claim and desire to secure by Letters-Patent, is'

purpose described comprising a bracket having upper and lower apertured arms, a cup containing mercury secured in the lower apertured arm ci' the bracket and separated therefrom by insulating material and having depending binding post, a pipe integral binding postffor the connection of a extending through the upper apertuied arm wire y of the electric circuit, a vacuum pipe F l of the bracket and provided below said arm extending upward through the upper apertured arm b ofthe bracket C, and threaded at its lower end, a ,cylinder vGr screwed on the said threaded end of pipe F and having an interior abutment 7i and also having an aperl n u with an exterior thread, a cylinder intei'iorly threaded at its upper' end and receiving the said threaded end of the pipe and having an l interior abutment and also having an aperplunger tured head at its lower end, and a Z connected to said plun- In an electric signal, a circuit closer for the movable in said Cylinder, between the abut- In testimony whereof I have hereunto set ment and apertured head thereof, and havmy hand in presence of two subscribing witng a depending stem and a non-conducting nesses. linger piece on the stem the lower end of the GEORGE LANGLUME. said stem being arranged when the plunger is Nitnessesz permitted to move downward, to enter the AVITUs C. KELLY,

mercury in the cup. WILLIAM ZENGE. 

